Order-Disorder Transitions in Formula Presented

Puspa Upreti; Matthew Krogstad; Charlotte Haley; Mihai Anitescu; Vishwas Rao; Lekh Poudel; Omar Chmaissem; Stephan Rosenkranz; Raymond Osborn

doi:10.1103/PhysRevLett.128.095701

Order-Disorder Transitions in Formula Presented

Puspa Upreti, Matthew Krogstad, Charlotte Haley, Mihai Anitescu, Vishwas Rao, Lekh Poudel, Omar Chmaissem, Stephan Rosenkranz, Raymond Osborn

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The classification of structural phase transitions as displacive or order-disorder in character is usually based on spectroscopic data above the transition. We use single crystal x-ray diffraction to investigate structural correlations in the quasiskutterudites, Formula Presented, which have a quantum phase transition at Formula Presented. Three-dimensional pair distribution functions show that the amplitudes of local atomic displacements are temperature independent below the transition and persist to well above the transition, a signature of order-disorder behavior. The implications for the associated electronic transitions are discussed.

Original language	English
Article number	095701
Journal	Physical Review Letters
Volume	128
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.128.095701
State	Published - Mar 4 2022
Externally published	Yes

Funding

We thank Michael Norman for scientific discussions, Johnpierre Paglione and Jeffrey Lynn for support in the sample preparation and characterization, and Douglas Robinson for technical support during the experiments. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering and used resources of the Advanced Photon Source, a U.S. Department of Energy Office of Science User Facility at Argonne National Laboratory. Crystal structure images were generated using CrystalMaker, CrystalMaker Software Ltd. . ® We thank Michael Norman for scientific discussions, Johnpierre Paglione and Jeffrey Lynn for support in the sample preparation and characterization, and Douglas Robinson for technical support during the experiments. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering and used resources of the Advanced Photon Source, a U.S. Department of Energy Office of Science User Facility at Argonne National Laboratory. Crystal structure images were generated using CrystalMaker?, CrystalMaker Software Ltd. [31].

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10.1103/PhysRevLett.128.095701

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AU - Poudel, Lekh

AU - Chmaissem, Omar

AU - Rosenkranz, Stephan

AU - Osborn, Raymond

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AB - The classification of structural phase transitions as displacive or order-disorder in character is usually based on spectroscopic data above the transition. We use single crystal x-ray diffraction to investigate structural correlations in the quasiskutterudites, Formula Presented, which have a quantum phase transition at Formula Presented. Three-dimensional pair distribution functions show that the amplitudes of local atomic displacements are temperature independent below the transition and persist to well above the transition, a signature of order-disorder behavior. The implications for the associated electronic transitions are discussed.

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Order-Disorder Transitions in Formula Presented

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